Once you have a checkout, other CVS commands like "cvs diff" and "cvs
update" will work without any additional arguments. (The repository's
location is recorded in the CVS subdirs.)

While everybody can read all the files, the repository is only
writable by a select few (but if you have something you'd like
to change, by all means send mail to the mailing list).

The "xconq" module does not include a version of tcl/tk libraries. If
you don't already have those installed, you can check out the
"xconq-all" module instead, which will include versions of those
libraries that have been modified to compile using the same
configure/make that builds the rest of Xconq.